The former Hornets striker does not see any reason why the club cannot secure a second win at the Emirates Stadium in three weeks this weekend.
Watford legend Luther Blissett has told the London Evening Standard that there is no reason why the club cannot shock Arsenal to win at the Emirates Stadium for the second time in three weeks when the teams meet again on Saturday.
That booked a Wembley semi-final against Crystal Palace next month and was a highlight of an already successful season for Quique Sanchez Flores' side which has seen them steer well clear of relegation danger throughout the campaign.
Blissett, who is both the record goalscorer and highest appearance-maker for Watford, insists that the promoted side must travel to the Emirates Stadium looking to secure all three points yet again against Arsene Wenger's side.
The former England striker told the Standard: "If Watford go out with the same attitude as last time they can give them a run. There's no reason why they can't replicate it.
"But Arsenal have it all to play for. They could still win the league if they go out and win the next five. Arsene Wenger will be prepared."
Despite Blissett's claim that Arsenal can still win the Premier League title, the North London club face a mountainous task to overhaul Leicester City and rivals Tottenham Hotspur.
A run of form which has seen them win just three of their last 10 league matches has left Wenger's side six points behind Spurs and a further five adrift of the Foxes, and even with their game in hand over the leaders that 11-point gap looks incredibly difficult to close with just eight matches remaining.